HARNESS AS 1980857 - Caterpillar

Illustration 1 g00519122
(1) Power train charging pump section
(2) Power train scavenge pump section
(3) Power train oil filter The pump has two sections:
power train charging pump section (1)
power train scavenge pump section (2)The pump is driven by a gear on the torque converter.Power train charging pump section (1) is located on the drive end of the power train gear pump. This pump section takes oil from the torque converter sump. The oil flows through a suction screen. The oil is then sent to the power train oil filter (3). The oil is then split. Some of the oil is sent to the torque converter lockup clutch and solenoid valve. This oil is used to engage the torque converter lockup clutch. The rest of the oil is sent to the transmission hydraulic control. This oil will be used to engage the proper clutches in the transmission. Some oil will flow from the transmission hydraulic control to the torque converter. This oil will be used as the hydraulic coupling during torque converter drive. Oil that leaves the torque converter is sent to the power train oil cooler. The oil will flow from the power train oil cooler to the transfer gears and to the transmission for lubrication.Power train scavenge pump section (2) takes oil from the transmission case reservoir. The oil flows from the transmission case reservoir through a magnetic screen. The oil flows from the magnetic screen to power train scavenge pump section (2). Oil will flow from power train scavenge pump section (2) to the torque converter sump.